Jack isn't like the Pagoda brothers. He knows the difference between fun and stupid.

Long Synopsis:

Jack isn't like the Pagoda brothers. He knows the difference between fun and stupid. Launching yourself across the backyard in a makeshift Roman catapult? Fun. Smoking an entire pack of cigarettes as fast as possible? Stupid. But when it comes to emergency self-surgery...Jack still has something to learn. A short story from the acclaimed collection Guys Read: Funny Business, edited by Jon Scieszka.